Convert Kilocalorie to Kilojoule
1 kilocalorie = 4.184 kilojoule (kJ). Type any value below to convert kilocalorie to kilojoule both ways — it runs entirely in your browser.
Kilocalorie to Kilojoule conversion formula
To convert kilocalorie to kilojoule, multiply by 4.184:
kilojoule = kilocalorie × 4.184
Going the other way, 1 kilojoule = 0.2390057 kilocalorie, so
kilocalorie = kilojoule × 0.2390057.
Kilocalorie to Kilojoule — worked examples
| Kilocalorie | Kilojoule |
|---|---|
| 1 kcal | 4.184 kJ |
| 2 kcal | 8.368 kJ |
| 3 kcal | 12.552 kJ |
| 5 kcal | 20.92 kJ |
| 10 kcal | 41.84 kJ |
| 25 kcal | 104.6 kJ |
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
Kilocalorie ↔ Kilojoule reference table
| Kilocalorie → Kilojoule | Kilojoule → Kilocalorie |
|---|---|
| 1 kcal = 4.184 kJ | 1 kJ = 0.2390057 kcal |
| 2 kcal = 8.368 kJ | 2 kJ = 0.4780115 kcal |
| 5 kcal = 20.92 kJ | 5 kJ = 1.195029 kcal |
| 10 kcal = 41.84 kJ | 10 kJ = 2.390057 kcal |
| 20 kcal = 83.68 kJ | 20 kJ = 4.780115 kcal |
| 50 kcal = 209.2 kJ | 50 kJ = 11.95029 kcal |
| 100 kcal = 418.4 kJ | 100 kJ = 23.90057 kcal |
| 250 kcal = 1,046 kJ | 250 kJ = 59.75143 kcal |
| 500 kcal = 2,092 kJ | 500 kJ = 119.5029 kcal |
| 1000 kcal = 4,184 kJ | 1000 kJ = 239.0057 kcal |
About kilocalorie and kilojoule
Kilocalorie: A kilocalorie (the food "Calorie", Cal) is 1,000 small calories — exactly 4,184 J. It is the energy figure printed on nutrition labels.
Kilojoule: A kilojoule is 1,000 joules — the energy unit on food labels (shown next to kilocalories) and for everyday amounts of energy.
Frequently asked questions
- How many kilojoule are in 1 kilocalorie?
- 1 kilocalorie = 4.184 kilojoule (kJ).
- How do I convert kilocalorie to kilojoule?
- Multiply the number of kilocalorie by 4.184. For example, 10 kilocalorie = 10 × 4.184 = 41.84 kilojoule.
- How many kilocalorie are in 1 kilojoule?
- 1 kilojoule = 0.2390057 kilocalorie.
- Which is bigger, kilocalorie or kilojoule?
- 1 kilocalorie equals 4.184 kilojoule, so a kilocalorie is the larger unit.